Thank you so much to everyone who has contributed and shared in this thread. I gave the online assessment in class today and had the students work independently, then pair up with someone they hadn't yet worked with before submitting their answers. Scores ranged from 1 (3 students) to 9 (1 student). I left the assessment unlocked as "read only" and instructed the students to review it tonight.
I'm currently tweaking the tests and quizzes that folks were kind enough to share here into my own exam that I will give tomorrow, and cross my fingers that kids manage to eek out grades that I can curve into something passable.
Again, thank you so much for sharing what you've already done, so that those of us behind the NYC 8-ball of late start & days off have resources to mooch!